Method and First Node for Managing Transmission of Probe Messages

1. A method, performed by a first node, for managing transmission of at least one probe message for detection of failure of a second node, wherein a network comprises the first and second nodes, the method comprises: receiving a message about an event caused by the second node, wherein the message comprises an identifier of the second node causing the event and an event type of the event caused by the second node, retrieving at least one policy for failure detection based on the event type, modifying a probe list based on said at least one policy by placing an instance of the identifier of the second node in a position within the probe list, which is different from a position of an instance of the identifier of the second node in the probe list before reception of the message about the event, wherein the probe list indicates an order and a frequency of probing, which are changed based on positions of instances of identifiers of nodes within the probe list, the nodes, neighbouring to the first node, are to be probed by transmission of the probe messages in accordance with the positions of the instances of the identifiers of the nodes in the probe list, the second node is one of the nodes neighbouring to the first node, and transmitting the probe messages according to the positions of the instances of the identifiers of the nodes in the probe list.

2. The method according to claim 1 , wherein the event type relates to one or more of: loss of message, and change of criticality level of the second node.

3. The method according to claim 1 , wherein the event type is associated with a first layer and the policy is associated with a second layer, wherein the first layer is different from the second layer, wherein the retrieving of said at least one policy comprises: translating the event type of the first layer to said at least one policy of the second layer based on rules, wherein the rules map the event type of the first layer to said at least one policy of the second layer.

4. The method according to claim 1 , wherein each policy of said at least one policy comprises one or more of: an indication about probing order, a parameter relating to the frequency of probing, a type of probe message, and a time stamp.

5. The method according to claim 1 , wherein the modifying of the probe list comprises: setting a position of the second node in the probe list based on said at least one policy, thereby modifying the probe list in terms of the frequency and the order with respect to the second node.

6. A first node configured for managing transmission of at least one probe message for detection of failure of a second node, wherein a network comprises the first and second nodes, the first node comprises: a processing circuit; and a memory, wherein the processing circuit comprises instructions executable by the processing circuit whereby the first node is operable to: receive a message about an event caused by the second node, wherein the message comprises an identifier of the second node causing the event and an event type of the event caused by the second node, retrieve at least one policy for failure detection based on the event type, modify a probe list based on said at least one policy by placing an instance of the identifier of the second node in a position within the probe list, which is different from a position of an instance of the identifier of the second node in the probe list before reception of the message about the event, wherein the probe list indicates an order and a frequency of probing, which are changed based on positions of instances of identifiers of nodes within the probe list, the nodes, neighbouring to the first node, are to be probed by transmission of the probe messages in accordance with positions of the instances of the identifiers of the nodes in the probe list, the second node is one of the nodes neighbouring to the first node, and transmit the probe messages according to the positions of the instances of the identifiers of the nodes in the probe list.

7. The first node according to claim 6 , wherein the event type relates to one or more of: loss of message, and change of criticality level of the second node.

8. The first node according to claim 6 , wherein the event type is associated with a first layer and the policy is associated with a second layer, wherein the first layer is different from the second layer, wherein the first node is configured for retrieving said at least one policy by translating the event type of the first layer to said at least one policy of the second layer based on rules, wherein the rules map the event type of the first layer to said at least one policy of the second layer.

9. The first node according to claim 6 , wherein each policy of said at least one policy comprises one or more of: an indication about probing order, a parameter relating to the frequency of probing, a type of probe message, and a time stamp.

10. The first node according to claim 6 , wherein the first node is configured for modifying the probe list by setting a position of the second node in the probe list based on said at least one policy, thereby modifying the probe list in terms of the order and the frequency of probing with respect to the second node.

11. A non-transitory computer-readable medium with instructions stored thereon which, when executed on a first node for managing transmission of at least one probe message for detection of failure of a second node, cause the first node to: receive a message about an event caused by the second node, wherein the message comprises an identifier of the second node causing the event and an event type of the event caused by the second node, retrieve at least one policy for failure detection based on the event type, modify a probe list based on said at least one policy by placing an instance of the identifier of the second node in a position within the probe list, which is different from a position of an instance of the identifier of the second node in the probe list before reception of the message about the event, wherein the probe list indicates an order and a frequency of probing, which are changed based on positions of instances of identifiers of nodes within the probe list, the nodes, neighbouring to the first node, are to be probed by transmission of the probe messages in accordance with the positions of the instances of the identifiers of the nodes in the probe list, the second node is one of the nodes neighbouring to the first node, and transmit the probe messages according to the positions of the instances of identifiers of the nodes in the probe list.